glowstick

noun
UK /ˈɡləʊ.stɪk/
US /ˈɡloʊ.stɪk/

A small plastic tube that makes light when you bend it.

She waved a green glowstick at the concert.


OTHER MEANINGS

2. A toy used at parties and festivals for decoration or fun.

The kids handed out glowsticks at the birthday party.

3. A safety light used by campers or divers in the dark.

He clipped a glowstick to his backpack before the night hike.

4. A temporary light source used during power outages.

When the power went out, we cracked a few glowsticks.